Depending upon the amounts, you would need to file an Estate Income Tax Return (Form 1041) for 2020, as any funds received in 2020 belong to her Estate. This cannot be online, so see:
TurboTax® Business CD/Download 2020-2021 Desktop Software, File Business Taxes (intuit.com)
About Form 1041, U.S. Income Tax Return for Estates and Trusts | Internal Revenue Service (irs.gov)
